SERIAL NUMBER CAN BE FOUND IN BATTERY COMPARTMENT (LAST FOUR DIGITS ARE THE DATE CODE(YEAR AND WEEK)
ALL HUADA ROTARY LASER CHANGING TO 2 X BRIGHTNESS INTERNALS AND MAIN BOARD THE DIFFERENCE BEING THE LATER MODELS (2 X BRIGHTNESS) HAVE A 3 PIN LEAD RUNNING FROM THE CENTRAL COLUMN TO THE MAIN BOARD AND THE MAIN BOARD HAS A 3 PIN CONNECTOR
DATE CODES TO BE ADVISED - AFTER WEEK 35 2011 (I0011135 - LAST 4 DIGITS)
Charger accessory number is 1-77-127 (KD1000) this may change to CH007
